Transmission



March 7, 1944. MNDASEK 2,343,509

TRANSMISSION Filed May 28, 1 41 INVENTOR. .q/bsaw dazvonsc-lr m zza m Patented Mar. 7, 1944 UNITED STATES .PATENT OFF] TRANSMISSION Joseph Jandasek, Detroit, Mich.', assignor to Bendix Aviation Corporation, Detroit, Mich., a corporation of Delaware Application May 28, 1941, Serial No. 395,668

' Claims. (01. 74-1895) This invention relates to transmissions. 7

Broadly the invention comprehends a transmission including a direct drive, an overdrive, and a flexible connection in theoverdrive.

An object of the invention is to provide a transmission having a direct drive, an overdrive, and means connected in the overdrive for smoothing the operation thereof and for inhibiting shock.

Other objects and advantages of the invention will appear from the following description taken in connection with the drawing forming a part of this speciflcatiomand in which- The drawing is a comprehensive view, largely in section, and partly in elevation, of a turbo drive embodying the invention. 4

Referring to the drawing for more specific details of the invention, I6 represents a driving shaft adaptedto be coupled to the crank shaft of an internal combustion. engine, not shown, and

I 2 represents a driven shaft suitably supported in axial alignment with the driving shaft.

A fluid brake indicated generally at I4 is jur-- naled on the driving shaft. This brake includes an impeller I6 and a turbine I8 providing in conjunction with one another a vortex chamber 26 for the circulation of fluid. v i

As shown, the turbine I8 includes a hub 22 supported for rotation on suitable spaced bearings 24 fitted on the driving shaft I 0, and the hubhas a web 26 supporting vanes 28. The hub 22 also has thereon .a drum 30, and a friction brake 32 is associated with the drum.

The impeller I6 includes a hub 34 supported for rotation on suitable spaced bearings 36 arranged on the driving shaft I0, and the hub has a web. 38 supporting blades 40 'in oppositely disposed relation to the vanes 28. The web 38 has a tion of the adjacent end of the driving shaft Ill, and a suitable one-way clutch 86 is interposedbetween the shaft Ill and the flange.

In a normal operation, direct drive is attained by force transmitted from the driving shaft I0 through the one-way clutch 80 to the driven shaft I2. During this operationthe fluid brake I4 is idling. When it is desired to effect an overdrive,

peripheral flange 42, and suitably secured to this flange is a housing 44 arranged in spaced relation to the back of the turbine. The housing 44 has a hub 46 sleeved over the hub 22 of the turbine, and interposed between the.hubs 22 and 46 is a suitable bearing 48 and also a sealing member 66, the latter inhibiting seepage of fluid from the housing.

The hub 34 of the impeller has suitably secured thereto a sun gear 52, the purpose of which will hereinafter appear, and a cylindrical housing 54 extended from the web 38 in concentric relation I to the sun gear 52 has thereon a braking surface 56 forcooperation with a brake 66, and suitably the brake 32 is set or applied to secure the turbine I8 against'movement. This results in bringing into play the impeller I6 through the mediumof the sun gear 52 driven by the planet pinions .66 on the flange 64 of the driving shaft I0, and transmission of force to the ring gear 68 in mesh with the planet pinions 66 and the consequent transfer of force from the ring gear through the web '12 on the hub 14 of the driven shaft I2.

The fluid brake I4 serves as an efficient cushion since it provides for adequate slip between the stationary turbine and therotating impeller, serving to yieldingly restrain the sun gear 52. The overdrive is most emcient for relative high speeds. When it is desired to attain top speed, the brake 58 is applied to lock the fluid, brake I4 against movement. Under this condition, a strictly mechanicaldrive with increased ratio of speed is obtained. During this operation, force is transmitted from the driven shaft I6 through the pl-anetaryvgear comprising gears 52, 66 and 68 to the. web I2 on the hub I4 secured to the driven shaft I2.

,While this invention has been described in connection with certain specific embodiments, the principle involved is susceptible of "numerous other applications that will readily occur to persons skilled in the art. The invention is, therefore, to be limited only as indicated by the scope secured to the housing 54 is a closure plate 66 having a bearing support 62.

The driving shaft I Ilextends' into the housing 54, and the shaft has thereon within the housing of the appended claims.

Having thus described the various features of.

the invention, what I claim as new and desire to secure by Letters Patent is:

1. A transmission comprising driving and driven shafts, a one-way-drive connected betwe n the shafts, means providing for increased ratio of speed connecting the shafts, means providing ratio of speed means, and means for holding the member against movement.

2. A transmission comprising driving and driven shafts, means coupling the shafts for forward drive, means coupling the shafts providing for increase in speed of the driven shaft, and a fluid brake connected to the latter coupling independent control means for the fluid brake providing different stages of overdrive.

3. A transmission comprising driving and driven shafts, means providing direct drive therebetween, means coupling the shafts providing for increase in speed of the driven shaft, and means connected in the latter coupling for absorbing shock and providing multi-stage overdrive including a fluid energizing element. and a fluid energy absorbing element, and a brake for each of the elements.

4. A transmission comprising driving and driven shafts, means providing for direct drive thereon the driving shaft, planetary gearing coupling the shafts and connected to one of the cooperative elements, and selective means for independent control of the cooperative elements.

6. A transmission comprising a driving shaft, a driven shaft, a one-way drive therebetween, a planetary gearing system connecting the shafts, a fluid brake connected to the planetary gearing system, including an impeller and a turbine, and brakes for control of the gearing system and fluid brake.

7. A transmission comprising a driving shaft, a driven shaft and a one-way drive connecting the shafts, a planetary gearing system connected between the shafts, a fluid power transmitting unit including an impeller and a turbine connected to the gearing system, means for control of the turbine to effect a variable overdrive, and

means for control of the gearing system and impeller to attain the maximum increased ratio of speed between the driving and driven shafts.

8. A transmission comprising driving and driven shafts, a direct drive means'coupling the shafts, a gearing system coupling the shafts, fluid energizing means connected to the gean'ng system, means for absorbing energy. from the fluid, and means for control of the energizing and energy absorbing means.

JOSEPH JANDASEK. 

